Effect of orthokeratology on peripheral aberrations of the eye
Purpose: To investigate the effect of orthokeratology on peripheral aberrations in two myopic volunteers.
Methods: The subjects wore reverse geometry orthokeratology lenses overnight and were monitored for 2 weeks of wear. They underwent corneal topography, peripheral refraction (out to ±34° along the horizontal visual field) and peripheral aberration measurements across the 42° × 32° central visual field using a modified Hartmann-Shack aberrometer.
Results: Spherical equivalent refraction was corrected for the central 25° of the visual fields beyond which it gradually returned to its preorthokeratology values. There were increases in axial coma, spherical aberration, higher order root mean square aberrations, and total root-mean-squared aberrations (excluding defocus). The rates of change of vertical and horizontal coma across the field changed in sign. Total root mean square aberrations showed a quadratic rate of change across the visual field which was greater subsequent to orthokeratology.
Conclusion: Although orthokeratology can correct peripheral relative hypermetropia it induces dramatic increases in higher-order aberrations across the field
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|Item Type:||Journal Article|
|Keywords:||Aberrations, Coma, Corneal refractive surgery, corneal topography, myopia, orthokeratology, Peripheral aberrations, Peripheral Ocular aberrations, Peripheral refraction|
|Subjects:||Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300) > Ophthalmology (111301)|
Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300) > Vision Science (111303)
|Divisions:||Current > QUT Faculties and Divisions > Faculty of Health|
Current > Institutes > Institute of Health and Biomedical Innovation
Current > Schools > School of Optometry & Vision Science
|Copyright Owner:||Copyright 2009 American Academy of Optometry.|
|Copyright Statement:||Copyright American Academy of Optometry. Unauthorised reproduction of this article is prohibited.|
|Deposited On:||11 Jan 2010 10:33|
|Last Modified:||01 Mar 2012 00:08|
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